PLZ SOLVE IT...........xd
Answers
Here is your answer☺️
1. (3x+7)^2 - 84x = (3x-7)^2
= LHS
= (3x+7)^2
= (3x)^2 + 2(3x+7) + (7)^2
= 9x^2 + 42x + 49
= 9x^2 + 42x + 49 - 84
= 9x^2 - 42x + 49
= RHS
= (3x-7)^2
= (3x)^2 - 2(3x+7) + (7)^2
= 9x^2 - 42x + 49
Hence, LHS = RHS
2. (9p-5q)^2 + 180pq = (9p+5q)^2
= LHS
= (9p-5q^2
= (9p)^2 - 2(9p×5q) + (5q)^2
= 81p^2 - 90pq + 25q^2
= 81p^2 - 90pq + 25q^2 + 180pq
= 81p^2 + 90pq + 25q^2
= RHS
= (9p+5q)^2
= (9p)^2 + 2(9p×5q) + (5q)^2
= 81p^2 + 90pq + 25q^2
Hence,LHS = RHS
3. (4/3m-3/4n) + 2mn = 16/9m^2 + 9/16n^2
= (4/3m-3/4n)^2
= (4/3m)^2 - 2(4/3m×3/4n) + (3/4n)^2
= 16/9m^2 - 2mn + 9/16n^2
= 16/9m^2 + 9/16n^2 - 2mn + 2mn
= 16/9m^2 + 9/16n^2
Hence, LHS = RHS
4. (4pq+3pq)^2 - (4pq-3pq)^2 = 48pq^2
= (4pq+3q)^2
= (4pq)^2 + 2(4pq×3pq) + (3q)^2
= 16pq^2 + 24pq^2 + 9q^2
= (4pq-3q)^2
= (4pq)^2 - 2(4pq×3q) + (3q)^2
= 16pq^2 - 24pq^2 + 9q^2
= 16pq^2 + 24pq^2 + 9q^2 - 16pq^2 + 24pq^2 - 9q^2
= 48pq^2
Hence, LHS = RHS
5. (a+b)(a+b)+(b-c)(b+c)+(c-a)(c+a) = 0
= (a)^2-(b)^2+(b)^2-(c)^2+(c)^2-(a)^2
= 0
Hence, LHS = RHS
Answer:
1st ans is right ans.................